Spline meshes don't seem to collapse evenly if they have geometry in between the start and end points. The test project demonstrates this by having a spline mesh move its end point closer to the start point so you can see how it collapses.

I attached an image comparing the bad and good versions so you know what the incorrect collapsed mesh looks like.

Steps to Reproduce
  1. Open attached project
  2. Select the BP actor named "SplineMeshBug" in the scene
  3. In the details panel left click and lower the "Debug End" value by left clicking and scrubbing the slider and watch as the spline mesh collapses
  4. Change the mesh to "modularMesh_Cut" and repeat step 3

When modularMesh_Cut is collapsing it doesn't do so evenly along the mesh. It appears the verts in the center collapse much sooner providing a wrinkled result.

The mesh collapses evenly as one end gets closer to the other.

Have Comments or More Details?

Head over to the existing Questions & Answers thread and let us know what's up.

Login to Vote

Won't Fix
Affects Versions4.
CreatedApr 26, 2017
ResolvedAug 18, 2021
UpdatedAug 18, 2021